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《Hongshui River》 2009-01
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Modification of Technical Water Supply Forward(Backward) Control System for Units of Longtan Hydropower Station

XU Gang,WANG Yu-sheng(Longtan Hydropower Plant,Tian'e 547300)  
The hydroelectric generating unit with a rated capacity of 778MVA at Longtan hydropower station is the largest total air-cooling unit in the world.In order to ensure the reliable source of technical water supply for the unit as well as a safe and steady operation of each bearing's cooler,the technical water supply operates based on forward/backward switching as designed,controlled by four electrical switch valves made in Israel that are able to work forwardly and backwardly.Problems found in initial operation of the unit and causes resulting in failure of forward/backward switching are studied.The control procedure is improved to achieve the correct control of the valve.
【CateGory Index】: TV734
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